/*
     This file is part of GNUnet.
     Copyright (C) 2013 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Affero General Public License for more details.
    
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file gnsrecord/test_gnsrecord_crypto.c
 * @brief testcase for block creation, verification and decryption
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_dnsparser_lib.h"
#include "gnunet_gnsrecord_lib.h"

#define RECORDS 5

#define TEST_RECORD_TYPE GNUNET_DNSPARSER_TYPE_TXT

#define TEST_RECORD_DATALEN 123

#define TEST_RECORD_DATA 'a'

#define TEST_REMOVE_RECORD_TYPE 4321

#define TEST_REMOVE_RECORD_DATALEN 255

#define TEST_REMOVE_RECORD_DATA 'b'


static struct GNUNET_CRYPTO_EcdsaPrivateKey * privkey;

static struct GNUNET_GNSRECORD_Data *s_rd;

static char *s_name;

static int res;


static struct GNUNET_GNSRECORD_Data *
create_record (int count)
{
  struct GNUNET_GNSRECORD_Data *rd;

  rd = GNUNET_new_array (count, struct GNUNET_GNSRECORD_Data);
  for (unsigned int c = 0; c < count; c++)
  {
    rd[c].expiration_time = GNUNET_TIME_absolute_get().abs_value_us + 1000000000;
    rd[c].record_type = TEST_RECORD_TYPE;
    rd[c].data_size = TEST_RECORD_DATALEN;
    rd[c].data = GNUNET_malloc(TEST_RECORD_DATALEN);
    memset ((char *) rd[c].data, TEST_RECORD_DATA, TEST_RECORD_DATALEN);
  }
  return rd;
}


static void
rd_decrypt_cb (void *cls,
               unsigned int rd_count,
               const struct GNUNET_GNSRECORD_Data *rd)
{
  char rd_cmp_data[TEST_RECORD_DATALEN];

  GNUNET_assert (RECORDS == rd_count);
  GNUNET_assert (NULL != rd);
  memset (rd_cmp_data,
          'a',
          TEST_RECORD_DATALEN);
  for (unsigned int c = 0; c < rd_count; c++)
  {
    GNUNET_assert (TEST_RECORD_TYPE == rd[c].record_type);
    GNUNET_assert (TEST_RECORD_DATALEN == rd[c].data_size);
    GNUNET_assert (0 == memcmp (&rd_cmp_data,
                                rd[c].data,
                                TEST_RECORD_DATALEN));
  }
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
	      "Block was decrypted successfully \n");
  res = 0;

}

static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  struct GNUNET_GNSRECORD_Block *block;
  struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
  struct GNUNET_HashCode query_pub;
  struct GNUNET_HashCode query_priv;
  struct GNUNET_TIME_Absolute expire = GNUNET_TIME_absolute_get();

  privkey = GNUNET_CRYPTO_ecdsa_key_create ();
  GNUNET_assert (NULL != privkey);
  /* get public key */
  GNUNET_CRYPTO_ecdsa_key_get_public (privkey,
                                      &pubkey);

  /* test query derivation */
  GNUNET_GNSRECORD_query_from_private_key (privkey,
                                           "testlabel",
                                           &query_priv);
  GNUNET_GNSRECORD_query_from_public_key (&pubkey,
                                          "testlabel",
                                          &query_pub);
  GNUNET_assert (0 == memcmp (&query_priv,
                              &query_pub,
                              sizeof (struct GNUNET_HashCode)));
  /* create record */
  s_name = "DUMMY.dummy.gnunet";
  s_rd = create_record (RECORDS);

  /* Create block */
  GNUNET_assert (NULL != (block =
                          GNUNET_GNSRECORD_block_create (privkey,
                                                         expire,
                                                         s_name,
                                                         s_rd,
                                                         RECORDS)));
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_GNSRECORD_block_verify (block));
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_GNSRECORD_block_decrypt (block,
                                                 &pubkey,
                                                 s_name,
                                                 &rd_decrypt_cb,
                                                 s_name));
  GNUNET_free (block);
  GNUNET_free (privkey);
}


int
main (int argc, char *argv[])
{
  static char *const argvx[] = {
    "test-gnsrecord-crypto",
    NULL
  };
  static struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_OPTION_END
  };

  res = 1;
  GNUNET_PROGRAM_run ((sizeof (argvx) / sizeof (char *)) - 1,
                      argvx,
                      "test-gnsrecord-crypto",
                      "nohelp", options,
                      &run, &res);
  return res;
}

/* end of test_gnsrecord_crypto.c */
